Page 191 - Maths Skills - 8

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12 Large Numbersarge NumbersData HandlingData Handling

Learning Outcomes

In this chapter, you will learn about:
� Grouping of data � Double bar graph � Pie chart or circle graph
� Bar graph � Histogram � Probability

Boot-Up (To Recapitulate Previous Knowledge of Concepts)

COMPETENCY BASED QUESTIONS

A. Multiple-Choice Questions

1. The average of 1, 2, 3, 4 and 5 is ____________
(i) 2 (ii) 3 (iii) 4 (iv) 5

2. If the mean of 10 values is 3, then the sum of all the values is ____________
(i) 10 (ii) 3 (iii) 30 (iv) 13

3. The range of the data 10, 13, 15, 11 and 21 is ____________
(i) 3 (ii) 2 (iii) 11 (iv) none of these
4. The mode of the data 1, 2, 3, 1, 2, 1, 2, 1, 3, 1 and 4 is ____________
(i) 1 (ii) 2 (iii) 3 (iv) 4

B. Fill in the Blanks
1. The difference between the highest and the lowest observation of a data is called the ______________.
2. The ______________ of a set of observations is the observation that occurs most often.

3. In a given data, arranged in ascending or descending order, the ______________ gives us the middle
observation.
4. The mean, mode and median of a given data lie in between the ______________ and the maximum
values of the data.

C. Write ‘T’ for true and ‘F’ for false Statements
1. The median of the data 23, 36, 45, 17, 18, 25, 35 is 25 .

2. A bar graph is the pictorial representation of data.

3. Single bar graphs help to compare two collections of data at a glance.

4. Range is the difference between the highest value and the lowest value of observation.